STORE WORKER IN NEED OF HELP?

THE STORE I WORK AT 2 WEEKS AGO HAD SOME MONEY COME UP MISSING. THE MAN MANAGER WAS AT A MEETING AND THE SHIFT LEADER WAS IN CONTROL OF EVERYTHING. THE MANAGER AND SHIFT LEADER ARE THE ONLY ONE WITH A KEY TO THE SAFE.IF WE NEED MONEY WE HAVE TO PUSH THE ON OF THE AMOUNT WE NEED AND IT DROPS OUT OF THE SAFE. IM SEEN ON CAMERA GETTING MONEY FOR MY DRAWER AND PUTTING THE MONEY IN MY DRAWER BUT THEY DON'T SEE ME PUT THE AMOUNT THAT I GOT BACK IN THROUGH THE SAFE DROP. AND NOW IM BEING INVESTIGATED FOR STEALING MONEY.IM ALWAYS WHERE THE CAMERA CAN SEE ME AND SEE MY DRAWER.IT DOES NOT SHOW ME DOING ANYTHING WRONG BESIDES SUPPOSED NOT PUTTING MONEY BACK IN THE SAFE. WHICH TO BEGIN WITH I ALWAYS MAKE SURE I PUT THE MONEY IN THE SAFE THAT GOES THERE.ANYWAY WHEN MY DRAWER IS COUNTED OUT THAT NIGHT IT SHOWS THAT IM OVER A FEW PENNIES AND THAT'S IT.SO THAT SHOWS THAT THE MONEY WAS PUT IN THE SAFE LIKE IT WAS SUPPOSED TO BE. AS OF RIGHT NOW IM BEING INVESTIGATED AND SUSPENDED AND ONE PERSON WAS FIRED.HOW IS IT THAT THE SHIFT LEADER HAS HAD NOTHING DONE TO THEM AND THEY HAVE MORE ACCESS TO THE SAFE. HOW CAN THEY DO THIS AND WHAT CAN I OR SHOULD I DO. I HAVE BEEN AT THIS JOB FOR TWO IN A HALF MONTHS AND HAVE NEVER HAD PROBLEMS WITH MY DRAWER OR ANYTHING. IF THERE WAS A PROBLEM THAT I COULD NOT FIGURE OUT I WOULD CALL THE MANAGER OR LEAVE A NOTE AND THE PROBLEM WAS ALWAYS FOUND AND FIXED. I REALLY NEED HELP CAUSE I'M NOT GOING TO BE BLAMED FOR SOMETHING I DID NOT DO. I TRIED TELLING THE GM THIS BUT ALL THAT WAS SAID THERE WAS I DON'T BELIEVE YOU AND WHERES MY MONEY.